Kilometers to Miles Converter
Instant km to mi conversion. Enter a number and get the answer right away.
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How to Convert km to mi
1 km equals 0.621371 mi. To convert km to mi, multiply by 0.621371 (mi = km × 0.621371). For example, 10 km is 6.2137 mi. The calculator above applies the same conversion in both directions, so you can also type a value in mi to get km.
mi = km × 0.621371
One km equals 0.621371 mi. Use the formula below for any number.
km to mi Conversion Table
| km | mi |
|---|---|
| 1 km | 0.621371 mi |
| 2 km | 1.242742 mi |
| 3 km | 1.864114 mi |
| 5 km | 3.106856 mi |
| 10 km | 6.213712 mi |
| 15 km | 9.320568 mi |
| 20 km | 12.427424 mi |
| 25 km | 15.53428 mi |
| 50 km | 31.06856 mi |
| 75 km | 46.602839 mi |
| 100 km | 62.137119 mi |
| 150 km | 93.205679 mi |
| 200 km | 124.274238 mi |
| 500 km | 310.685596 mi |
| 1000 km | 621.371192 mi |
Common km to mi Conversions
When You Need This Conversion
Useful for road signs, running distances, travel planning, and reading height and room measurements.
Units and Conventions
This page uses the international mile: 1 statute mile = 1,609.344 m exactly. A nautical mile is 1,852 m, and 1 inch is exactly 2.54 cm. US survey feet and survey miles differ slightly from international feet and miles.
Kilometers to miles: real-world reference points
Anchor the number to distances people already know before you trust it.
- Marathon (42.195 km) 26.219 mi
- 5 km park run 3.107 mi
- 100 km/h speed limit 62.1 mph
- 1,000 km road trip 621.4 mi
Note: Miles here are statute miles (1,609.344 m), not nautical miles (1,852 m). A nautical mile is about 15% longer, so aviation and marine distances do not use this factor.
Related Converters
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Frequently Asked Questions
How many mi are in 1 km?
1 km equals 0.621371 mi. The formula is mi = km × 0.621371.
What is the km to mi formula?
Use mi = km × 0.621371. The calculator above applies it instantly and also works in reverse.
How precise is the km to mi result?
Results show 6 decimal places. The calculation uses mi = km × 0.621371, so 1 km = 0.621371 mi before rounding.
Where is the km to mi conversion table?
The table above lists common km values with their mi equivalents, computed from mi = km × 0.621371.
Which definition of km and mi does this page use?
See the Units and Conventions section above - it gives the exact definition used here and the alternatives common in other countries.
When is km to mi needed?
Useful for road signs, running distances, travel planning, and reading height and room measurements. Enter any km value above to see its mi equivalent.
